12161003636 has 12 divisors (see below), whose sum is σ = 21370064100. Its totient is φ = 6055271040.

The previous prime is 12161003597. The next prime is 12161003641. The reversal of 12161003636 is 63630016121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8608128400 + 3552875236 = 92780^2 + 59606^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12161003599 and 12161003608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6306611 + ... + 6308538.

It is an arithmetic number, because the mean of its divisors is an integer number (1780838675).

Almost surely, 2^12161003636 is an apocalyptic number.

It is an amenable number.

12161003636 is a deficient number, since it is larger than the sum of its proper divisors (9209060464).

12161003636 is a wasteful number, since it uses less digits than its factorization.

12161003636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12615394 (or 12615392 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 12161003636 its reverse (63630016121), we get a palindrome (75791019757).

The spelling of 12161003636 in words is "twelve billion, one hundred sixty-one million, three thousand, six hundred thirty-six".